An Efficient Ocean SAR Raw Signal Simulation by Employing Fast Fourier Transform

Synthetic aperture radar (SAR) raw signal simulations for dynamic ocean scene are presented in this paper. In order to improve the computation efficiency of time domain SAR raw signal simulation method, a proper analytical reformulation is made to the time domain expression. This reformulation allows us to design a very efficient simulation scheme by employing fast Fourier transform (FFT) codes. Accordingly, the computational load is dramatically reduced with respect to a time-domain (TD) simulation method, and this makes SAR raw signal simulation of dynamic ocean scene feasible. The SAR images of ocean scene are illustrated, proving the validity and practicability of the presented algorithms.

[1]  Jong-Il Park,et al.  A Comparative Study on ISAR Imaging Algorithms for Radar Target Identification , 2010 .

[2]  Christophe Bourlier,et al.  One- and two-dimensional shadowing functions for any height and slope stationary uncorrelated surface in the monostatic and bistatic configurations , 2002 .

[3]  Hui-zhi Chen,et al.  Robust Semi-Deterministic Facet Model for Fast Estimation on EM Scattering from Ocean-Like Surface , 2009 .

[4]  Hean-Teik Chuah,et al.  MODIFIED ALGORITHM FOR REAL TIME SAR SIGNAL PROCESSING , 2008 .

[5]  J. Mitchell,et al.  Aircraft measurements of the microwave scattering signature of the ocean , 1977, IEEE Journal of Oceanic Engineering.

[6]  David Lyzenga,et al.  Numerical Simulation of Synthetic Aperture Radar Image Spectra for Ocean Waves , 1986, IEEE Transactions on Geoscience and Remote Sensing.

[7]  Sungjin Joung,et al.  3 Dimensional Ocean Wave Model Using Directional Wave Spectra For Limited Capacity Computers , 1991, OCEANS 91 Proceedings.

[8]  Young-Soo Kim,et al.  Multilook Coherence Estimation Using Adaptive Weighted Window in Interferometric SAR , 2007 .

[9]  R. Raney,et al.  A simulation for spaceborne SAR imagery of a distributed, moving scene , 1989 .

[10]  J. Ewing,et al.  Directional Wave Spectra Observed during JONSWAP 1973 , 1980 .

[11]  Xinhua Mao,et al.  Signatures of Moving Target in Polar Format Spotlight SAR Image , 2009 .

[12]  Giorgio Franceschetti,et al.  On ocean SAR raw signal simulation , 1998, IEEE Trans. Geosci. Remote. Sens..

[13]  Werner Alpers,et al.  Monte-Carlo simulation studies of the nonlinear imaging of a two dimensional surface wave field by a synthetic aperture radar , 1990 .

[14]  Hiroshi Kawamura,et al.  Surface wave parameters retrieval in coastal seas from spaceborne SAR image mode data , 2008 .

[15]  Hong Tat Ewe,et al.  High-frequency Phase Error Reduction in Sar Using Particle Swarm of Optimization Algorithm , 2007 .